You can now convert legacy Advanced LUNs into new Advanced LUNs, which come with instant snapshots and performance improvements.

Added password strength meter for creating and modifying passwords.

When you install or upgrade your DSM version through the Internet, it will now automatically be upgraded to the corresponding DSM version with critical and security updates.
The following models are not available due to hardware performance limitations.

Fixed an issue where VAAI might fail after iSCSI LUN was recovered by LUN Backup.

Fixed an issue where LUN configuration might be inconsistent.

Minor bug fixes.

Version: 6.2-23739

(2018-05-24)

Important Note

The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly.

Compatibility and Installation

DSM 6.2 can only be installed on Synology products running DSM 6.0 and above.

Starting from DSM 6.2, the core replication function is centrally managed by a new package, Replication Service. Packages with replication feature, such as Snapshot Replication, must install the Replication Service package.

For the following models, DSM 6.2 will be the last upgradable version. DSM 6.2 will continue to receive critical and security updates for a minimum of 2 years after the official release.

For easier management, Key Manager can now be stored locally on Synology NAS. Encrypted shared folders can be auto-mounted without the need of a USB drive. (To achieve better data protection, users are suggested to store Key Manager on an external USB drive.)

Standard users can now right-click on shared folders in File Station to view Properties.

Added support for IBM WebSphere SSO.

Enhanced password strength policy for better account security.

Added support for a new SMS provider SendinBlue and Clickatell API (RESTful).

Brand new iSCSI Manager built for IT administrators, providing a new management user interface for an optimized iSCSI management and monitoring experience.

Advanced LUN provides lightning-fast LUN snapshot creation and recovery, and LUN cloning within seconds, as well as VAAI/ODX, storage acceleration commands, and support for better VM performance. Since Advanced LUNs can utilize file system cache to provide better efficiency, block-level LUNs will no longer be supported on DSM 6.2 and onward. DSM 6.2 will still be compatible with the block-level LUNs upgraded from DSM 6.1 and prior.

Supports cross-volume LUN clones.

Added support for network binding settings to allow each iSCSI target to map to a network interface.

Users can now disable storage reclamation for thin-provisioned LUNs to enhance I/O performance.

Storage Manager

The brand new Overview shows the health status of all storage components on your NAS, displaying a clearer and better look on the system overview.

Introduced Storage Pool, a new storage component, to replace the original Disk Group and RAID Group, and rearrange storage-related functions to provide users with a more consistent and smoother experience.

Smart Data Scrubbing detects the supported file system and RAID type to perform data scrubbing automatically while enhancing data scrubbing usability. A new built-in scheduler allows users to do data scrubbing periodically with just a few clicks, improving data integrity and consistency.

RAID resync speed can now be adjusted to accommodate IT management needs.

Wi-Fi dongle does not support Parental Control and Device List if set as Bridge Mode.

Starting from DSM 6.2 Beta, Virtual Machine Manager will no longer support creating clusters with older DSM versions. Please update each host in the cluster to the same DSM version or above versions for the Virtual Machine Manager cluster to operate properly.

SSH authentication by DSA public key is prohibited for security concerns.

When logging in through VPN or Proxy server, some functionalities may have authentication issues. To fix this issue, please go to Control Panel > Security, and click the Trusted Proxies button to add the trusted proxy server to the list.

The original RAID scrubbing scheduled tasks will be migrated to Smart Data Scrubbing scheduled tasks. If the upgrade is performed while running scheduled tasks, the Data Scrubbing process will automatically be re-executed shortly after the upgrade is completed.

Office 2.x and below are not compatible with DSM 6.2.

Version: 5.2-5967-9

(2019-01-02)

Important Note

The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed an issue where iSCSI service could not start upon system boot with snapshot retention policy enabled in DSM 5.2-5644.

Fixed an issue where iSCSI service could not respond under certain conditions when LUN was being created or removed.

Fixed an issue where the system could not enter hibernation with Snapshot Manager for VMware registered.

To enhance the security level, Synology's default administrator account "admin" with the blank password will no longer be allowed and will be disabled after this update. It is also highly recommended that you increase the password strength of all accounts belonging to the administrators group.

Fixed an issue where permission settings for a shared folder could not be edited in Windows if the folder was mounted via SMB.

Version: 5.2-5644-8

(2016-04-13)

Fixed a security vulnerability regarding Samba file service (CVE-2016-2118, also known as Badlock).

Note: This update does not require system reboot.

Version: 5.2-5644-5

(2016-02-19)

Fixed Issues

Updated Firewall filter policy to fix a security vulnerability caused by stack-based buffer overflow (CVE-2015-7547). This fix may impact read/write performance on the following models by no more than 15%, for which Synology is working on an enhancement in the future release.

To enhance the security level, auto block will be enabled after this update.

Enhanced network stability when port forwarding is configured.

Upgraded PHP to 5.5.31.

Version: 5.2-5644-1

(2015-11-17)

Fixed Issues

To enhance the security level, Synology's default administrator account "admin" with the blank password will no longer be allowed and will be disabled after this update. It is also highly recommended that you increase the password strength of all accounts belonging to the administrators group.

Enforced a minimal password length of six characters for the default admin account.

Improved general stability when numerous application privilege rules are applied to individual users/groups.

Version: 5.2-5644

(2015-11-13)

What's New

This update includes all bug fixes as well as security fixes in the previously released critical updates since DSM 5.2-5592.

Fixed Issues

Improved stability of FTP connections.

Improved stability when copying large files on DS216play.

Improved general stability and security fixes of NTP service (CVE-2015-7871).

Fixed an issue where SSD cache volume information may not be displayed correctly in Resource Monitor.

Fixed an issue where users with guest accounts would be unable to create new files or folders via SMB protocol.

Version: 5.2-5565

(2015-05-12)

Compatibility and Installation

DSM 5.2 can only be installed on Synology products running DSM 5.0 or above. Before starting, please log in to DSM and go to DSM Update to install the latest DSM.

Some features have specific hardware requirements and are only available on certain Synology NAS products.

Important Notes

DSM 5.2 is the last supported major DSM version for all 10-series models.

An issue of data consistency caused by SSD TRIM is not resolved yet; as a result, SSD TRIM is currently disabled in DSM 5.2.

DSM 5.2 is the last DSM version to support Time Backup as an add-on application in Package Center. Time Backup features will be fully merged into the built-in Backup package in future releases. Existing Time Backup users will not be affected.

Sharing via Facebook and Google+ will no longer be supported starting from DSM 5.2.

The link speed of drive tray 7 and 8 of DS1815+ is adjusted to 1.5Gbps to improve system stability and HDD compatibility. (added on 2016/8/12)

What’s New in DSM 5.2

Single Sign-On

You can register multiple DSM and access them using one set of credentials. After initial login, linked DSM accounts will automatically log in to avoid credential re-authentication.

Windows File Sharing

Added SMB3 and end-to end data encryption support.

Backup and Replication

Added support for file-level restoration with File Version Browser in multi-version backup tasks.

You can set up backup rotation to recycle old backup versions automatically in multi-version backup tasks.

Added data transfer encryption support for multi-version backup.

Added support for Amazon S3 China Region as a backup destination.

iSCSI LUN Snapshots

You can take iSCSI snapshots more frequently, up to every five minutes.

You can set the snapshot retention policy to retain a specific number of versions for hourly, daily, weekly, monthly, and yearly snapshots.

Link Aggregation

Added support for two new modes when creating a bond interface: Adaptive Load Balancing and Balance XOR.

SSD Cache

SSD cache now has a smaller memory footprint, consuming 90% less memory than DSM 5.1 for newly created SSD caches.

File Station

You can manage and transfer files to popular public cloud services such as Dropbox, Box, Google Drive, and OneDrive.

You can set usage quotas for different groups. The group usage quota is automatically applied when a user is added to the group.

What’s New in Packages

Single Sign-On Package

Based on the OAuth2 standard, SSO Server package turns Synology NAS into a SSO server that allows developers to register their web applications to the server and utilize the single sign-on feature. This increases daily productivity by saving time spent on re-authentication.

Docker

Docker is a lightweight virtualization application that gives you the ability to run thousands of containers created by developers from all over the world on DSM. The hugely popular built-in image repository, Docker Hub, allows you to find shared applications from other talented developers.

A step-by-step tutorial is introduced to guide you through the basic container creation.

Note Station

Added to-do list feature. You can add tasks to notes or add them independently to the to-do list.

Manage tasks by specifying a priority, due date, and reminder.

Synology Web Clipper is now available on the Chrome Web Store. You can clip web content directly to Note Station.

Export notebooks to a nsx file for backup or for importing to another Synology NAS.

Export individual notes as HTML files so that users without Note Station can read them.

You can archive seldomly used notebooks so that they will not be displayed in the notebook section or in search results.

You can use hotkeys to fast forward, rewind, and adjust the volume during video playback.

Subtitle files can now be located anywhere on your Synology NAS and no longer need to match the filename of your video files. Simply select them using the built-in chooser in Video Station during playback.

More code-pages supported to correctly recognize subtitles in different languages.

You can set a timing offset to sync subtitles with video playback.

You can customize video posters by selecting an image from your Synology NAS.

Redmine is a flexible project management web application. It has numerous features and can be run on Synology NAS via Docker.

GitLab

GitLab is a web-based Git repository manager with wiki and issue tracking features. It has numerous features and can be run on Synology NAS via Docker.

LXQt

LXQt is a desktop utility built on QT with partial Razor-qt and LXDE components. It comes with a basic graphical user interface which gives users the ability to leverage certain operating system features, such as web browsing. It has numerous features and can be run on Synology NAS via Docker.

SpreeCommerce

SpreeCommerce is a full-featured storefront tool built on common standards so you do not have to compromise speed to market, efficiency, or innovation. You can also easily leverage the advantages of modular design to configure, supplement, or replace the functionalities you need. It has numerous features and can be run on Synology NAS via Docker.

Discource

Discourse is a forum application software with a focus on user experience by introducing infinite scrolling, live updates, drag and drop attachments and more. It has numerous features and can be run on Synology NAS via Docker.

MantisBT

MantisBT is an open source, web-based issue tracker and project management tool with a focus on simplicity and flexibility. Users are able to get started quickly and manage their projects effectively, making collaboration with team members and clients easy and professional.

LimeSurvey

LimeSurvey is a powerful survey creation tool that help you easily create and publish intuitive and question-and-answer surveys and collect responses without the requirement of technical background. LimeSurvey also provides graphical analysis of the result for you to quickly find the information from the statistics. You also have the full control of whom to access the survey, either publish the survey publicly or limit only the users with the "once-only" token.

CMS

Enhanced general performance.

Bug fixes and usability enhancements.

Version: 6.2.1-23824-6

(2019-02-19)

Important Note

The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

This update will restart your Synology NAS if you are using the models listed below.

Plus Series : DS218+, DS718+, DS918+, DS1019+

Value Series : DS418play

Fixed Issues

Fixed an issue where abnormal reboot while converting SHR type or expanding SHR capacity may cause the storage volume not to be properly mounted.

Fixed an issue where the completion of Snapshot Replication under high load environment may result in abnormal reboot.

Minor bug fixes.

Version: 6.1.7-15284-3

(2019-01-02)

Important Note

The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

You can now convert legacy Advanced LUNs into new Advanced LUNs, which come with instant snapshots and performance improvements.

Added password strength meter for creating and modifying passwords.

When you install or upgrade your DSM version through the Internet, it will now automatically be upgraded to the corresponding DSM version with critical and security updates.
The following models are not available due to hardware performance limitations.

Version: 6.2-23739

The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly.

Compatibility and Installation

DSM 6.2 can only be installed on Synology products running DSM 6.0 and above.

Starting from DSM 6.2, the core replication function is centrally managed by a new package, Replication Service. Packages with replication feature, such as Snapshot Replication, must install the Replication Service package.

For the following models, DSM 6.2 will be the last upgradable version. DSM 6.2 will continue to receive critical and security updates for a minimum of 2 years after the official release.

For easier management, Key Manager can now be stored locally on Synology NAS. Encrypted shared folders can be auto-mounted without the need of a USB drive. (To achieve better data protection, users are suggested to store Key Manager on an external USB drive.)

Standard users can now right-click on shared folders in File Station to view Properties.

Added support for IBM WebSphere SSO.

Enhanced password strength policy for better account security.

Added support for a new SMS provider SendinBlue and Clickatell API (RESTful).

Brand new iSCSI Manager built for IT administrators, providing a new management user interface for an optimized iSCSI management and monitoring experience.

Advanced LUN provides lightning-fast LUN snapshot creation and recovery, and LUN cloning within seconds, as well as VAAI/ODX, storage acceleration commands, and support for better VM performance. Since Advanced LUNs can utilize file system cache to provide better efficiency, block-level LUNs will no longer be supported on DSM 6.2 and onward. DSM 6.2 will still be compatible with the block-level LUNs upgraded from DSM 6.1 and prior.

Supports cross-volume LUN clones.

Added support for network binding settings to allow each iSCSI target to map to a network interface.

Users can now disable storage reclamation for thin-provisioned LUNs to enhance I/O performance.

Storage Manager

The brand new Overview shows the health status of all storage components on your NAS, displaying a clearer and better look on the system overview.

Introduced Storage Pool, a new storage component, to replace the original Disk Group and RAID Group, and rearrange storage-related functions to provide users with a more consistent and smoother experience.

Smart Data Scrubbing detects the supported file system and RAID type to perform data scrubbing automatically while enhancing data scrubbing usability. A new built-in scheduler allows users to do data scrubbing periodically with just a few clicks, improving data integrity and consistency.

RAID resync speed can now be adjusted to accommodate IT management needs.

Wi-Fi dongle does not support Parental Control and Device List if set as Bridge Mode.

Starting from DSM 6.2 Beta, Virtual Machine Manager will no longer support creating clusters with older DSM versions. Please update each host in the cluster to the same DSM version or above versions for the Virtual Machine Manager cluster to operate properly.

SSH authentication by DSA public key is prohibited for security concerns.

When logging in through VPN or Proxy server, some functionalities may have authentication issues. To fix this issue, please go to Control Panel > Security, and click the Trusted Proxies button to add the trusted proxy server to the list.

The original RAID scrubbing scheduled tasks will be migrated to Smart Data Scrubbing scheduled tasks. If the upgrade is performed while running scheduled tasks, the Data Scrubbing process will automatically be re-executed shortly after the upgrade is completed.

Office 2.x and below are not compatible with DSM 6.2.

Version: 6.1.7-15284

(2018-05-23)

Important Note

The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed the compatibility issue of WD WD8001FFWX with the DX1215 expansion unit.

Version: 6.1-15047-1

(2017-02-25)

Fixed a security vulnerability with the Auto Block function that could allow remote attackers to bypass the current IP blocking mechanism.

Version: 6.1-15047

(2017-02-21)

Compatibility and Installation

DSM 6.1 can only be installed on Synology products running DSM 6.0. Before starting, please log in to DSM and go to Control Panel > Update & Restore to install the latest DSM.

Time Backup and HiDrive Backup will not be supported in DSM 6.1 and above.

We can not guarantee the accuracy or completeness of third party packages, which are not developed by Synology.

Manual re-indexing is required for all files after upgrading to DSM 6.1. The file indexing service in Control Panel has been moved to the preference settings in Synology Universal Search.

Due to infrastructure update, packages will need re-initialization after upgrading to DSM 6.1. The process will occupy a higher CPU usage and can take up to an hour depending on the number of packages installed.

Directory Server package must be disabled (stop) in Package Center before the upgrade if the server is running on a High Availability cluster.

The DSM Help articles in the following languages have been removed: Brazilian Portuguese, European Portuguese, Norwegian, Turkish, Hungarian, Swedish, Danish. In all the packages, the Help articles in these six languages will also be removed.

What’s New in DSM 6.1 Official

Extended Btrfs File System Coverage

Btrfs file system is now available on more Synology NAS models. Enjoy the powerful features of the next-generation file system.

Supports Bonjour service, allowing you to back up data to multiple shared folders via Time Machine.

Supports sparse files over the SMB protocol to enhance usage efficiency of file system space and network bandwidth.

You can now restore to a previous version from Windows Explorer when mounting your home folder via the SMB protocol.

After enabling files fast clone in File Service advanced settings, files can be copied at a faster speed when the source and destination are within the same Btrfs volume.

Storage Manager

RAID type can now be changed from SHR-1 to SHR-2, providing greater flexibility of storage expansion and better data protection. Note: Depending on your disk configuration, two additional disks may be required when changing your RAID type from SHR-1 to SHR-2. For more information, please refer to DSM Help.

Provides more types of disk health status to help you grasp the health info of your disks.

You can now migrate a single volume to a disk group and then create multiple volumes while using SHR (more flexible for models built on the 32-bit architecture with a single volume size limit of 16TB) .

Resource Monitor

IT administrators will receive notifications regarding performance issues of the CPU, memory, disks, or LUNs (available on XS+ and XS models).

I/O throughput of each process can now be monitored in Task Manager (available on models with Intel 64-bit processors).

Added the service-based view, allowing you to monitor resource usage of each service and application (available on models with Intel 64-bit processors).

Service Modularization

Some of DSM’s built­-in features have been modularized into packages to ensure better system maintenance and update flexibility.

Fixed an issue where system resources are not released properly after QuickConnect is enabled.

Fixed an issue where file indexing is not triggered when files are uploaded through Samba protocol.

Version: 6.0.2-8451-1

(2016-09-02)

Important Note

The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.

Fixed Issues

Improved the stability of Btrfs file system when abnormal shutdown occurs under high system loads.

Fixed an issue where certain browsers and mobile apps might fail to connect to Synology NAS via HTTPS when HTTP/2 is enabled.

Fixed an issue where users might fail to log in after restoring system configurations from previous versions in the latest DSM 6.0.2.

Version: 6.0.2-8451

(2016-08-18)

Important Note

The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly. You can also manually download the patch file from Download Center.

What's New

This update includes all bug fixes as well as security fixes in the previously released updates since DSM 6.0.1.

You can now configure performance alarms on high-end models to notify system administrators when the resource utilization or performance metric meets the pre-defined criteria.

Fixed an issue where iSCSI service could not start upon system boot with snapshot retention policy enabled in DSM 5.2-5644.

Fixed an issue where iSCSI service could not respond under certain conditions when LUN was being created or removed.

Fixed an issue where the system could not enter hibernation with Snapshot Manager for VMware registered.

To enhance the security level, Synology's default administrator account "admin" with the blank password will no longer be allowed and will be disabled after this update. It is also highly recommended that you increase the password strength of all accounts belonging to the administrators group.

Fixed an issue where permission settings for a shared folder could not be edited in Windows if the folder was mounted via SMB.

Version: 6.0-7321-3

(2016-04-22)

Fixed multiple issues that might cause the iSCSI service to hang under heavy loading and performing VMware commands.

Fixed an issue where the file created time was not correctly set.

Fixed an issue where LUN backup tasks of Hyper Backup could not be completed due to insufficient disk space after upgrade to DSM 6.0.

Fixed an issue in which the configuration change of VLAN could result in abnormal functionality of certain packages. e.g. Surveillance Station

Fixed an issue where the DSM welcome title and message will be reset to default if users set it to blank.

Note: This update does not require system reboot.

Version: 5.2-5644-8

(2016-04-13)

Fixed a security vulnerability regarding Samba file service (CVE-2016-2118, also known as Badlock).

Note: This update does not require system reboot.

Version: 6.0-7321

(2016-03-24)

Compatibility and Installation

Some features have specific hardware requirements and are only available on certain Synology NAS products.

For security purposes, admin accounts with blank passwords will be disabled after the upgrade, and password change will be required.

Some third­-party packages may not be compatible with DSM 6.0; hence disabling the packages before upgrading to DSM 6.0 is necessary.

The current Alias settings in Application Portal will be disabled and require manual configuration after updating to DSM 6.0.

The DDNS of f3322.org is removed in DSM 6.0 official release due to unclarified domain usage violation. Please refer to http://www.pubyun.com/p/notice/ for details.

Due to the discontinued support by the open source team, the Asterisk package will no longer be supported after DSM 6.0.

If phpMyAdmin was upgraded during DSM 6.0 Beta 2, you need to uninstall it first so that its latest update will be available at Package Center.

The following packages will not be supported by NVR216 after upgrading to DSM 6.0:

PHP

Text Editor

Web Station

WebDAV

Internet Explorer 8 is no longer supported on DSM 6.0 and onward. Please refer to Software Spec for details

What’s New in DSM 6.0

Btrfs File System

Set usage/user quota for shared folders.

Enable file compression to increase the flexibility of volume usage.

Perform defragmentation to increase system performance.

Data checksum is enabled by default and data scrubbing can be run to verify data integrity.

When file versioning is enabled in Cloud Station, it will not occupy additional storage on Btrfs file system. On other file systems, file versioning will occupy additional space equal to the size of each shared folder.

Files will be backed up once the backup task is started, even if the files are changed or deleted afterwards.

Converting existing ext4 file system to Btrfs is not supported. To store files under Btrfs file system you must create a new Btrfs volume and move the files to the new file system.

DSM 6.0 has been optimized for all models based on Intel 64­-bit processors to improve general performance.

Supports over 4GB memory allocation for one single process to deploy large scale application.

High Availability Manager

When a split­-brain error occurs in an HA cluster, you can designate one server as the active server and overwrite the data on the other server. No full data replication is required.

When a split­-brain error occurs, you can view the recent system information, iSCSI Target connection history and file difference in each shared folder.

Reduced the downtime for upgrading a cluster by 50%.

Reduced the time to bind and unbind a cluster by 20%.

Reduced the occurrence of split­-brain errors.

Supports Docker DSM.

High Availability Manager for RC18015xs+

Supports Virtual DSM.

Supports Docker DSM.

Backup & Replication

Backup & Replication features are now available in ​add-­on packages Hyper Backup ​(backup client) and Hyper Backup Vault ​(backup server). The existing Backup & Replication task settings will be migrated to the new package automatically upon upgrading to DSM 6.0. Some settings are relocated to Control Panel:

rsync: Control Panel > File Services > rsync

Shared Folder Sync: Control Panel > Shared Folder Sync

For features of Hyper Backup ​and Hyper Backup Vault​, please refer to the What’s New in the Packages section.

Security

CSP support can effectively prevent XSS attacks.

TLS/SSL profiles can be adjusted according to your browser compatibility and security requirements.

Root account is replaced by administrators group credentials to log into SSH to enhance security.

Please note that the Beta program will continue after DSM 6.0 official release.

Starting from MailPlus Server 1.0 official release, MailPlus Server will include 5 free mail accounts by default, and licenses will be required for additional mail accounts. During the Beta program, no licenses will be required for any email accounts.

MailPlus Server provides enterprise­-grade mail server features and advanced active-­active architecture, allowing administrator to set up a high-­availability mail system with single server fault-­tolerance and load-­balancing abilities.

Active-­active mechanism ensures two-­way syncing of data between both servers to maximize the uptime for the mail system.

Load balancer smartly distributes incoming messages to ensure that the loadings on the two nodes are evenly balanced.

The specially designed algorithm allows you to search email content with a given keyword for an even more accurate result.

The spam-­filter has a much enhanced anti­-spam ability, especially for Chinese spams, by using implemented algorithm to analyze the meaning of the statement.

Customize spam filters by keywords for precise spam blocking.

The migration from the existing Mail Server to MailPlus Server is made seamless to let you continue using the previously hosted mail service.

Added support for running Surveillance Station on both Virtual DSM and
Docker DSM. (Please note that Surveillance Station running on Virtual DSM
or Docker DSM does not include any default surveillance device licenses.)

Added support for 2­-step verification using one-­time password (OTP) for
DSM 6.0 to provide extra security.

PetaSpace

PetaSpace is an application that combines the capacity of multiple
volumes into a larger volume group. With PetaSpace, data of a single
shared folder can now be located across multiple volumes, thus
allowing you to store, manage, and access the growing amount of
data more efficiently and flexibly.

Available on the following models:

16­-series: RS18016xs+

15­-series: RC18015xs+, DS3615xs

14­-series: RS3614xs+, RS3614xs, RS3614RPxs

13­-series: RS3413xs+, RS10613xs+

12­-series: DS3612xs, RS3412xs, RS3412RPxs

11­-series: DS3611xs, RS3411xs, RS3411RPxs

Cloud Station Server

Added support for setting user and group speed limit.

Integrated with DSM application privilege settings.

Offers Intelliversioning version rotation algorithm.

Run Cloud Station Server without enabling home service.

Enforce 2­-step verification to strengthen identity security.

Supports renaming shared folders when Cloud Station Server is
running.

Supports symbolic links.

Supports files containing "/" characters on Mac.

Now allows you to select multiple files/folders for restoration in
Version History.

Retains up to 32 versions of every backed up file and supports file
filtering. (Please refer to the software specifications for supported OS
versions.)

Cloud Sync

Synchronize a specified folder on the public cloud with a folder on
Synology NAS.

Configure multiple sync tasks in a single connection.

Sync a folder to multiple public cloud destinations.

Choose never to remove the data on the destination.

Supports read-­only shared folders.

Supports encrypted shared folders.

You can now customize the number of files to be concurrently
uploaded/downloaded.

You can now convert Google Docs to Microsoft Office or jpeg formats
in download­-only tasks to keep an offline backup copy.

Last modified time of synced files will be updated to Dropbox.

Now advanced consistency check can be disabled.

Supports creating a new remote folder during task creation.

Supports application privilege settings by group and IP.

Added support for:

Microsoft OneDrive for Business and Office 365

Microsoft OneDrive’s new API

HiDrive

Amazon S3 Standard -­ Infrequent Access storage class

Amazon S3 Seoul region

Reorganizes the order of public cloud services by device location.

Supports OpenStack keystone v3.

Now offers Windows and Linux decryption tools for data recovery.

Optimized memory usage.

Raised the minimum polling period to 10 seconds.

Directory Server

The Provider­-Consumer architecture in Directory Server allows the
account data to be continuously replicated from a "Provider"
Synology NAS to one or more "Consumer" servers. This ensures that
the connection between the clients and the server will not be affected
even when the Provider server is unavailable.

Password strength policy can now be applied to user accounts for
better security.

You can enforce regular and periodical password update to enhance
security. In addition, password expiration reminders will automatically
notify users to update their passwords via email or upon login.

Provided more detailed information, such as FPS, sample frequency,
and multiple audio tracks.

Added functions to edit video ratings and change the backdrop.

Customize library visibility according to your own preferences.

Subtitle size now can be adjusted to fit your preference.

Hyper Backup

Back up folders, packages, and DSM configurations to a multi­-version
repository and save backed up data in image formats to maximize
storage efficiency while retaining up to 65,535 versions for retrieval.

Supports port forwarding from a customized port of a backup task to a Synology NAS or a rsync server.

Now you can compress your files before transmitting them to the
backup target, saving the network bandwidth and storage
consumption.

Now allows multiple restore/download/copy tasks to run concurrently
in Hyper Backup Explorer.

With Hyper Backup installed, you can launch the Hyper Backup
Explorer by clicking the backup target in File Station.

Upgrade and migration:

The Backup & Restore ​package will be automatically migrated
to Hyper Backup upon upgrading from DSM 6.0 Beta 1.

The Backup & Replication ​package will be automatically
migrated to Hyper Backup upon upgrading from DSM 5.2.

Hyper Backup Vault

Hyper Backup Vault is a new package and will be automatically
installed upon upgrading to DSM 6.0.

You can enable backup services to allow another Synology NAS to
back up to your Synology NAS via Hyper Backup.

Provides an overview of the Hyper Backup targets backed up by other
Synology NAS servers.

Provides the information of each backup target, such as path, space
usage, last backup time, backup duration and backup logs.

With Hyper Backup Vault installed, you can launch the Hyper Backup
Explorer by clicking the backup target in File Station.

Hyper Backup Explorer​(for Windows and Linux)

Now you can use Hyper Backup Explorer to browse backup data right
from your Windows and Linux computers.

Note Station

Offline Note Station is now available in Chrome Web Store. You can
create and edit notes or to-­do lists without Internet connection, and
all updates will be synchronized to Note Station in DSM when the
Internet is connected.

Use Synology Web Clipper to save selected content of MailPlus or
Gmail to Note Station.

Convert tables into charts, including line charts, bar charts, and pie
charts.

Choose a template for your presentation.

Click to expand images to their original size in presentation mode.

Apply heading formats to texts to switch slides in presentation mode.

Create Smart Notebooks according to different criteria. Existing and
future notes that match the criteria will be automatically added to the
Smart Notebook.

Insert the internal link of another note and open it directly via the
hyperlink.

The search feature in Note Station now includes results based on the
content of attached files of various formats, including PDF, Office,
Open Office, and iWork file.

The attachments in PDF, word, excel, and powerpoint formats can be
previewed in Note Station directly with the Document Viewer
package.

You can add stars, remarks and subtasks to to-­do tasks.

You can share notes or notebooks with a group.

Supports exporting/importing to­-do tasks for backup.

Allows you to output to-­do tasks to a new note and customize its
display options.

PDF Viewer/Document Viewer

View various popular document formats on DSM, including Microsoft
Office and Open Office files (Document Viewer only).

Brand-­new designed user interface with comprehensive tools
including rotation, zoom­-in/out, search, and much more.

Fixed an issue where operations might fail when deleting or restoring a
large amount of files from the quarantine.

Fixed an issue where DSM system files might be deleted due to false alarm.

Antivirus -­ Essential

Upgraded ClamAV and McAfee scanning engine.

Fixed an issue where operations might fail when deleting or restoring a
large amount of files from the quarantine.

Fixed an issue where DSM system files might be deleted due to false alarm.

VPN Server

Enhanced transmission performance of PPTP/L2TP.

Minor bug fixes.

Web Station

Each Virtual Host can be set with an individual setting including PHP
version, server backend, document root and secure connections.

More PHP extensions are supported to increase the flexibility of your
own web site.

Media Server

Supports hardware transcoding on DS216play, DS716+, and DS216+.

Fixed an issue where video may not be sought when streaming videos
from DS216play and DS716+.

Minor bug fixes.

Logitech Media Server

Updated the stable version to 7.7.6.

Audio Station

Provides year information in album list.

Provides folder path of playlist for better recognition.

Enhanced browsing performance.

Added support for multi­-genre, allowing you to classify music more
flexibly.

Added an artist category in genre.

Photo Station

Added support for watermark to help protect the copyright of your
photos.

The plugin in WordPress, Joomla, and Drupal allows you to access Photo
Station directly and add photos or albums to these three platforms.

Windows AD and LDAP users can use Personal Photo Station now.

Supports html script for embedding Photo Station to other websites.

Security enhancement with XSS attack prevention.

Extend file size limitation of uploading and playing videos from 2GB to
32GB for 64 bits models.

Added a feature to prevent photos from being embedded via HTML
iframe.

Supports migration flow to export Photo Station blog and import to
WordPress.

Adjusted re­-order flow and new method to create a new album on photo
wall.

Shows photo shooting time and geolocation information on lightbox as
well as slideshow mode.

Docker

Upgraded to Docker 1.9.

Supports Docker Compose.

Download Station

Download files from more file hosting sites.

Added support for more premium accounts.

Added support for downloading tasks that require CAPTCHA
passwords.

Personal notification is supported so every user can set their personal
email to receive notifications.

File hosting plugin can be updated automatically.

Degraded NZB files can be repaired with .par2 files.

Storage Analyzer

Supports the application backup in the Hyper Backup package.

CardDAV

You can now edit contact information in DSM.

You can quickly build your contact list by importing data.

Supports exporting contact information to be used in other software.

Java 7/8

Java derives much of its syntax from C and C++ but has a simpler
object model and fewer low-­level facilities than either.

Java Manager is replaced by the new Java package for a more
convenient installation procedure.

You may enjoy the built­-in Java or manually install Java from Oracle
for enhanced compatibility.

Known Issues & Limitations

For locally modified files in a read­-only sync folder, the status will always be
"syncing" in DS cloud.

Re-­enabling indexing services previously set will be required when you
upgrading DSM 6.0.

Upgrade to DSM 6.0 will trigger media indexing for Audio Station browsing
enhancement.

Because of structure change, some notifications that occurred before the
upgrade could abnormally displayed. All notifications generated after
upgrading to DSM 6.0 will be shown normally.

MailPlus and MailPlus Server:

Initial retrieval of mail using the POP3 fetch function may take longer
than usual.

MailPlus Server is required to be configured before running MailPlus.

MailPlus is required to be installed on both Synology NAS devices to ensure stability when switching load balancing services from one server to the other for MailPlus Server.

Both Synology NAS devices must have identical MailPlus application portal and privilege settings to ensure stability when switching load balancing services from one server to the other for MailPlus Server.

To upgrade the MailPlus Server in active­-active mode from Beta 1/Beta 2 version to the official version, it is required to remove the cluster mechanism first and upgrade two nodes separately. After the upgrade, set up the active-­active cluster with two nodes again and the data will be synced automatically. Such initiative will not be required after DSM 6.0.

The function to customize library visibility will not be applied to DS video in
the following mobile platforms: iOS, Windows Phone, Roku TV, and Samsung
TV.

After converting the permission type to ACL, the settings in Photo Station and
File Station may still be inconsistent. For better user experience, the shared
folder "photo" will be converted automatically back to Linux mode if you
have done the ACL conversion in DSM 6.0 RC.

Version: 5.2-5644-5

(2016-02-19)

Fixed Issues

Updated Firewall filter policy to fix a security vulnerability caused by stack-based buffer overflow (CVE-2015-7547). This fix may impact read/write performance on the following models by no more than 15%, for which Synology is working on an enhancement in the future release.

To enhance the security level, auto block will be enabled after this update.

Enhanced network stability when port forwarding is configured.

Upgraded PHP to 5.5.31.

Version: 5.2-5644-1

(2015-11-17)

Fixed Issues

To enhance the security level, Synology's default administrator account "admin" with the blank password will no longer be allowed and will be disabled after this update. It is also highly recommended that you increase the password strength of all accounts belonging to the administrators group.

Enforced a minimal password length of six characters for the default admin account.

Improved general stability when numerous application privilege rules are applied to individual users/groups.

Version: 5.2-5644

(2015-11-13)

What's New

This update includes all bug fixes as well as security fixes in the previously released critical updates since DSM 5.2-5592.

Fixed Issues

Improved stability of FTP connections.

Improved stability when copying large files on DS216play.

Improved general stability and security fixes of NTP service (CVE-2015-7871).

Upgraded PHP to 5.5.2 to address two vulnerabilities (CVE-2015-0235 and CVE-2015-0273).

Minor bug fixes.

Version: 5.2-5565

(2015-05-12)

Compatibility and Installation

DSM 5.2 can only be installed on Synology products running DSM 5.0 or above. Before starting, please log in to DSM and go to DSM Update to install the latest DSM.

Some features have specific hardware requirements and are only available on certain Synology NAS products.

Important Notes

DSM 5.2 is the last supported major DSM version for all 10-series models.

An issue of data consistency caused by SSD TRIM is not resolved yet; as a result, SSD TRIM is currently disabled in DSM 5.2.

DSM 5.2 is the last DSM version to support Time Backup as an add-on application in Package Center. Time Backup features will be fully merged into the built-in Backup package in future releases. Existing Time Backup users will not be affected.

Sharing via Facebook and Google+ will no longer be supported starting from DSM 5.2.

The link speed of drive tray 7 and 8 of DS1815+ is adjusted to 1.5Gbps to improve system stability and HDD compatibility. (added on 2016/8/12)

What’s New in DSM 5.2

Single Sign-On

You can register multiple DSM and access them using one set of credentials. After initial login, linked DSM accounts will automatically log in to avoid credential re-authentication.

Windows File Sharing

Added SMB3 and end-to end data encryption support.

Backup and Replication

Added support for file-level restoration with File Version Browser in multi-version backup tasks.

You can set up backup rotation to recycle old backup versions automatically in multi-version backup tasks.

Added data transfer encryption support for multi-version backup.

Added support for Amazon S3 China Region as a backup destination.

iSCSI LUN Snapshots

You can take iSCSI snapshots more frequently, up to every five minutes.

You can set the snapshot retention policy to retain a specific number of versions for hourly, daily, weekly, monthly, and yearly snapshots.

Link Aggregation

Added support for two new modes when creating a bond interface: Adaptive Load Balancing and Balance XOR.

SSD Cache

SSD cache now has a smaller memory footprint, consuming 90% less memory than DSM 5.1 for newly created SSD caches.

File Station

You can manage and transfer files to popular public cloud services such as Dropbox, Box, Google Drive, and OneDrive.

You can set usage quotas for different groups. The group usage quota is automatically applied when a user is added to the group.

What’s New in Packages

Single Sign-On Package

Based on the OAuth2 standard, SSO Server package turns Synology NAS into a SSO server that allows developers to register their web applications to the server and utilize the single sign-on feature. This increases daily productivity by saving time spent on re-authentication.

Docker

Docker is a lightweight virtualization application that gives you the ability to run thousands of containers created by developers from all over the world on DSM. The hugely popular built-in image repository, Docker Hub, allows you to find shared applications from other talented developers.

A step-by-step tutorial is introduced to guide you through the basic container creation.

Note Station

Added to-do list feature. You can add tasks to notes or add them independently to the to-do list.

Manage tasks by specifying a priority, due date, and reminder.

Synology Web Clipper is now available on the Chrome Web Store. You can clip web content directly to Note Station.

Export notebooks to a nsx file for backup or for importing to another Synology NAS.

Export individual notes as HTML files so that users without Note Station can read them.

You can archive seldomly used notebooks so that they will not be displayed in the notebook section or in search results.

You can use hotkeys to fast forward, rewind, and adjust the volume during video playback.

Subtitle files can now be located anywhere on your Synology NAS and no longer need to match the filename of your video files. Simply select them using the built-in chooser in Video Station during playback.

More code-pages supported to correctly recognize subtitles in different languages.

You can set a timing offset to sync subtitles with video playback.

You can customize video posters by selecting an image from your Synology NAS.

Redmine is a flexible project management web application. It has numerous features and can be run on Synology NAS via Docker.

GitLab

GitLab is a web-based Git repository manager with wiki and issue tracking features. It has numerous features and can be run on Synology NAS via Docker.

LXQt

LXQt is a desktop utility built on QT with partial Razor-qt and LXDE components. It comes with a basic graphical user interface which gives users the ability to leverage certain operating system features, such as web browsing. It has numerous features and can be run on Synology NAS via Docker.

SpreeCommerce

SpreeCommerce is a full-featured storefront tool built on common standards so you do not have to compromise speed to market, efficiency, or innovation. You can also easily leverage the advantages of modular design to configure, supplement, or replace the functionalities you need. It has numerous features and can be run on Synology NAS via Docker.

Discource

Discourse is a forum application software with a focus on user experience by introducing infinite scrolling, live updates, drag and drop attachments and more. It has numerous features and can be run on Synology NAS via Docker.

MantisBT

MantisBT is an open source, web-based issue tracker and project management tool with a focus on simplicity and flexibility. Users are able to get started quickly and manage their projects effectively, making collaboration with team members and clients easy and professional.

LimeSurvey

LimeSurvey is a powerful survey creation tool that help you easily create and publish intuitive and question-and-answer surveys and collect responses without the requirement of technical background. LimeSurvey also provides graphical analysis of the result for you to quickly find the information from the statistics. You also have the full control of whom to access the survey, either publish the survey publicly or limit only the users with the "once-only" token.

CMS

Enhanced general performance.

Bug fixes and usability enhancements.

Version: 5.1-5022-5

(2015-04-23)

Fixed Issues

Fixed a vulnerability that could allow unauthorized access to the shared folders via SMB protocol.

What's New in DSM 5.1

Application Armor kernel security module is now enabled in DSM. Each system program is associated with a security profile that restricts certain functions, protecting against unknown threats from malicious software.

Service by Interface

You can set the network interface that each service will use in Control Panel > Info Center > Service.

App Privileges

You can assign application privileges for local and domain groups.

You can define application privileges according to IP address.

DSM Auto Update

You can create a schedule to install DSM updates automatically to keep your Synology NAS up-to-date.

You can create RAID groups and RAID arrays. A RAID group for Multiple Volumes or iSCSI LUNs (Block-Level) that use RAID 5 or RAID 6 may contain multiple RAID arrays.

You can no longer create or expand Synology Hybrid RAID arrays, however existing volumes can still be used.

Log Center

Added IPv6 support for log sending and receiving.

Added supports for customized log formats.

MyDS Center

Added a wizard to consolidate multiple MyDS accounts into one account for easy management and convenience. If you have multiple MyDS accounts, complete this wizard so you can continue enjoying our MyDS Center services.

You can easily monitor MyDS related services (DDNS/QuickConnect) at a glance.

You can modify account information and subscriptions directly in DSM.

Text Editor

You can now use hotkeys to quickly perform common actions.

You can convert between Traditional and Simplified Chinese text.

DSM Desktop

Push notifications can now be sent via Chrome and Safari.

You can change the main menu style to drop-down.

You can adjust the size of Desktop icons to be smaller.

Misc

You can set global firewall rules for all network interfaces.

You can set default permissions for external drives.

You can define each FTP user’s root folder to be a folder other than their home folder.

You can filter Domain Users and Groups by Organizational Unit.

A command-line-based FTP client is built-in for automated tasks.

You can now customize the SSH port.

Python core is now built-in.

What's New in Packages

Note Station

Note Station helps you fully enjoy writing, viewing, managing, and sharing content-rich notes. It is very easy to create content with rich text editing, media embedding, attachments, and much more. Manage your notes by using tags and grouping notes into Notebooks. You can also import your notebooks and notes from Evernote to centralize all your notes in one convenient place. When you are ready, Note Station makes sharing your content via social networking platforms simple and quick. Create, share, and enjoy!

Cloud Station

You can sync data according to Unix or Windows ACL privileges.

Added support for syncing encrypted shared folders.

Administrators can control the file type and file size specific users can sync.

Proxy Server provides caching and access control for HTTP-based services. With caching, you can reserve caching storage space on your Synology NAS to store HTTP-based content from the web. You can also use Proxy Server to deny users from accessing restricted web services, keeping your network safe and productive.

VPN Server

Added IPv6 support for OpenVPN (Requires DSM 5.1).

Glacier Backup

You can restore data at the file-level instead of whole archives through the new Explore feature.

You can now remove a specific file or folder from Amazon Glacier.

Added support for file-deduplication within the same backup task, saving your Amazon storage space tremendously.

Video Station

You can use the new home page to view recently added, released, and watched videos at a glance.

In the homepage of TV Recording, streaming online programs and setting recording tasks is now easier and quicker.

You can use the real-time filter to find your favorite videos quickly, and save the result as a smart collection.

You can view the display in three different modes – Poster, Tile, and List View.

You can use the “Watched” status on each video to keep track of videos you have already watched.

Retrieve online subtitles when starting to play a movie.

You can share a video collection via a sharing link, allowing anyone with the link to play the videos without having a DSM account. The page is optimized for display on desktop and mobile browsers.

Video information can be saved as files for data backup.

Audio Station

You can rate songs in your library and categorize music by rating.

You can import rating information from iTunes.

Search results will be displayed according to artist, album, and song title.

You can share your favorite playlist via a sharing link that is optimized for display on computer and mobile browsers.

You can set your favorite music to play in the background during a slideshow.

You can share photos in a virtual collection that is optimized for display on computer and mobile browsers.

Added support for sorting photos from oldest to latest in Timeline view.

Download Station

Redesigned visual style.

Added file hosting support for mega.co.nz.

You can save up to five different BitTorrent search results.

Mail Server

Mail Server can scan messages for potentially dangerous content.

You can send daily reports about the status of Mail Server. The report will include summaries of hourly traffic, delivered/received messages, deferred/rejected messages, SMTP delivery failures, warnings, and the quantity of senders and recipients.

Fixed one SNMP vulnerability where the improper validation of input could allow remote attackers to cause a denial of service (CVE-2014-2284).

Implemented minor fixes related to the ShellShock Bash vulnerabilities previously addressed in DSM 4493-05 updates (CVE-2014-6277, CVE-2014-6278, CVE-2014-7186 and CVE-2014-7187, or as known as Bash 4.2-51, 4.2-52, and 4.2-53 for their Bash Patch-ID).

Version: 5.0-4493-6

(2014-09-18)

Fixed Issues

Fixed an issue where DS414j could fail to start after system upgrade.

Version: 5.0-4493-5

(2014-09-10)

Improvement

Improve the stability of file copy to encrypted shared folders.

Fixed Issues

Fixed a vulnerability that could allow servers to accept unauthorized access.